feat: Configurable option for compression (#10)

* feat: Enable GZIP compression

* configurable option

* alphabetic order

Author: vrongmeal

s2-sdk/src/main/java/s2/client/StreamClient.java

@@ -35,6 +35,8 @@ public class StreamClient extends BasinClient {
   /** Name of stream associated with this client. */
   final String streamName;
 
+  private static final String compressionCodec = "gzip";
+
   private final StreamServiceFutureStub futureStub;
   final StreamServiceStub asyncStub;
 
@@ -61,14 +63,23 @@ public StreamClient(
     var meta = new Metadata();
     meta.put(Key.of("s2-basin", Metadata.ASCII_STRING_MARSHALLER), basin);
     this.streamName = streamName;
-    this.futureStub =
+
+    StreamServiceFutureStub futureStub =
         StreamServiceGrpc.newFutureStub(channel)
             .withCallCredentials(new BearerTokenCallCredentials(config.token))
             .withInterceptors(MetadataUtils.newAttachHeadersInterceptor(meta));
-    this.asyncStub =
+    StreamServiceStub asyncStub =
         StreamServiceGrpc.newStub(channel)
             .withCallCredentials(new BearerTokenCallCredentials(config.token))
             .withInterceptors(MetadataUtils.newAttachHeadersInterceptor(meta));
+
+    if (config.compression) {
+      futureStub = futureStub.withCompression(compressionCodec);
+      asyncStub = asyncStub.withCompression(compressionCodec);
+    }
+
+    this.futureStub = futureStub;
+    this.asyncStub = asyncStub;
   }
 
   /**

s2-sdk/src/main/java/s2/config/Config.java

@@ -7,6 +7,7 @@
 public class Config {
   public final String token;
   public final AppendRetryPolicy appendRetryPolicy;
+  public final Boolean compression;
   public final Endpoints endpoints;
   public final Integer maxAppendInflightBytes;
   public final Integer maxRetries;
@@ -17,6 +18,7 @@ public class Config {
   private Config(
       String token,
       AppendRetryPolicy appendRetryPolicy,
+      Boolean compression,
       Endpoints endpoints,
       Integer maxAppendInflightBytes,
       Integer maxRetries,
@@ -25,6 +27,7 @@ private Config(
       String userAgent) {
     this.token = token;
     this.appendRetryPolicy = appendRetryPolicy;
+    this.compression = compression;
     this.endpoints = endpoints;
     this.maxAppendInflightBytes = maxAppendInflightBytes;
     this.maxRetries = maxRetries;
@@ -46,6 +49,7 @@ public static final class ConfigBuilder {
     private Optional<Duration> requestTimeout = Optional.empty();
     private Optional<Duration> retryDelay = Optional.empty();
     private Optional<String> userAgent = Optional.empty();
+    private Optional<Boolean> compression = Optional.empty();
 
     ConfigBuilder(String token) {
       this.token = token;
@@ -56,6 +60,11 @@ public ConfigBuilder withAppendRetryPolicy(AppendRetryPolicy appendRetryPolicy)
       return this;
     }
 
+    public ConfigBuilder withCompression(Boolean compression) {
+      this.compression = Optional.of(compression);
+      return this;
+    }
+
     public ConfigBuilder withEndpoints(Endpoints endpoints) {
       this.endpoints = Optional.of(endpoints);
       return this;
@@ -91,6 +100,7 @@ public Config build() {
       return new Config(
           this.token,
           this.appendRetryPolicy.orElse(AppendRetryPolicy.ALL),
+          this.compression.orElse(false),
           this.endpoints.orElse(Endpoints.forCloud(Cloud.AWS)),
           this.maxAppendInflightBytes.orElse(Integer.MAX_VALUE),
           this.maxRetries.orElse(3),